Our Staff

Dr. Jill Rathus 


Dr. Rathus, co-founder and co-director of Cognitive Behavioral Associates, is an internationally recognized DBT & CBT expert working with both youth & adults. Dr. Rathus and colleagues developed the adolescent/family adaptation of DBT. Her books DBT with Suicidal Adolescents and DBT Skills for Suicidal Adolescents are the primary texts for Dialectical Behavior Therapy with teens and families. As a tenured faculty member at Long Island University-Post Campus, her areas of specialty include assessment evaluations, relationship distress, depression, anxiety disorders, writing coaching & writing anxiety, PTSD, suicidality, and borderline personality disorder, and she publishes widely in these areas in books & peer-reviewed journals. She has also authored books on topics including couples therapy, assessment of family violence, and adapting DBT for school settings. In 2016 she was honored to receive the Cindy Sanderson Outstanding Educator Award from the International Society of Education and Training in DBT (ISITDBT).  Dr. Rathus graduated from Cornell University with a B.A. in English, received her Ph.D. in psychology from Stony Brook University, and completed her clinical internship at Montefiore Medical Center/Einstein College of Medicine. Dr. Rathus has trained thousands of mental health professionals in both the US and abroad.

Dr. Ruth DeRosa


Dr. DeRosa is co-founder and co-director of Cognitive Behavioral Associates. She is an expert in the fields of Cognitive Behavioral Therapy (CBT), Dialectical Behavioral Therapy (DBT), mindfulness, anxiety, PTSD, borderline personality disorder, and adult & child traumatic stress. Intensively trained in DBT, she and colleagues have also developed DBT-informed treatments for teens experiencing chronic extreme stress as part of a federal grant supporting a national network of trauma specialists. She is currently on the editorial board for the Journal of Child and Adolescent Trauma and The Journal of Family Violence. Dr. DeRosa graduated Phi Beta Kappa and Summa Cum Laude from George Washington University and received her Ph.D. in Clinical Psychology from Duke University. In addition to publishing in the areas of CBT & DBT, she also consults with agencies working to integrate evidence-based practice and treatment programs in their organizations.  Dr. DeRosa trains and consults with therapists across the country regarding building clinical teams, as well as individual & group therapy, to help clients experiencing stress, PTSD, anxiety, OCD, panic disorder, depression, borderline personality disorder features and emotional dysregulation.

Dr. Gus Cutz

GusDr. Cutz is a CBA psychologist experienced in providing evidence-based treatments for individuals with mood, anxiety, trauma, adjustment, ADHD, and personality disorders. He is dedicated to CBT and DBT approaches, and his work has spanned a variety of settings including outpatient centers, inpatient, day treatment, and crisis consultations in emergency rooms. Dr. Cutz also has specialized training in prolonged exposure, an evidence-based type of trauma-focused work. He has also worked intensively with persons coping with bipolar disorder and severe depression. In addition, Dr. Cutz provides consultation to mental health agencies regarding DBT practices.  Dr. Cutz is an expert in the study and practice of mindfulness, including training in Nepal. Dr. Cutz has been coordinator of Long Island University SafeZone program, providing sensitivity training to clinicians regarding issues faced by LGBTQ individuals. While working at Rutgers University Behavioral Health Care in New Jersey, Dr. Cutz provided training in DBT principles and skills to clinical staff. Years ago he trained with us as a graduate student, and we are thrilled to have him back!

Dr. Avigail Margolis

Dr. Avigail Margolis is a Post-Doctoral Fellow experienced in providing CBT and DBT with children, teens and adults in a variety of settings including private practice, inpatient, partial hospital, and community mental health centers.  Dr. Margolis has been intensively trained in DBT and has collaborated with colleagues on four DBT consultation teams.  She is passionate about providing evidence-based treatment for anxiety, depression, personality disorders, adjustment difficulties and relationship issues.  Dr. Margolis provided CBT consultation to psychiatric residents during her internship at Trinitas Medical Center.  Prior to her training in psychology, Dr. Margolis was a teacher for middle-school children.  In addition, she served as the assistant clinical director for an organization, My Extended Family, which provides academic and social support to children who are living with a single parent.  Dr. Margolis graduated Summa Cum Laude from University of New York, Brooklyn College and received her Psy.D. from Long Island University, Post.

Dr. Madalina Yellico

Dr. Madalina Yellico is a Post-Doctoral Fellow who is trained in evidence-based practices, including CBT, DBT, and Parent-Child Interaction Therapy (PCIT). Dr. Yellico specializes in working with children, adolescents, and their families, frequently with a parent-training component. Dr. Yellico has worked in a variety of settings including inpatient units and outpatient centers throughout the New York area including Sagamore Children’s Psychiatric Center, Andrus Children Center, and NYU Lutheran Family Health Center. She completed her Ph.D. at St. John’s University with an expertise in the study of anger, rumination and impulsivity in relationships. Dr. Yellico graduated Summa Cum Laude in both her Bachelors and Masters degrees from Molloy College before completing her doctorate at St. John’s.

Dr. Nira Nafisi and Dr. Hilary Vidair, who maintain their own therapy practices, are also members of our DBT Consultation Team. We highly value their contribution to our team!